10 Important Physics question for most of the exam
Que 1: An object placed at 60cm in front of a concave mirror makes an image 30 cm in front of the mirror, then what is the distance of the focus of the mirror.
(A) 10cm
(B) 5cm
(C) 20cm towards the mirror
(D) 20cm behind the mirror
Correct Ans: C
Que 2: A vehicle stops in 20 sec after applying brakes, if the constant retardation due to the brakes is 1.5 m/sec², then what was the initial velocity of the vehicle.
(A) 30m/sec
(B) 3m/sec
(C) 15m/sec
(D) 40m/sec
Correct Ans: A
Que 3: Time period of a simple pendulum is 1.5 sec. If the length of the pendulum is increased by 4 times then what is the new time period.
(A) 13 sec
(B) 3 sec
(C) 1 sec
(D) 5 sec
Correct Ans: B
Que 4: Consider a static point charge. if the charge is negative, then the electric line of the forces are :
(A) Concentric circles with charge at the centre
(B) Straight lines radiating away from the charge
(C) Straight lines converging towards the charge
(D) Parallel straight lines
Correct Ans: C
Que 5: A wire of resistance 10 Ω is elongated through a die to double its length . its resistance will change to
(A) 40 Ω
(B) 20 Ω
(C) 15 Ω
(D) 5 Ω
Correct Ans: A
Que 6: 50w and 250v is marked on a lamp. Then what is the value of the current flowing in the circuit.
(A) 0.5 Ampere
(B) 0.4 Ampere
(C) 0.2 Ampere
(D) 0.3 Ampere
Correct Ans: C
Que 7: The time period of a pendulum depends on
(A) The mass
(B) The length
(C) The time
(D) Both the mass and the length
Correct Ans: B
Que 8: China wares are wrapped in straw paper before packing this is the application of concept of
(A) Impulse
(B) Momentum
(C) Acceleration
(D) Force
Correct Ans: A
Que 9: To convert Ac to DC
(A) Inverter
(B) Alternater
(C) Rectifier
(D) Starter moter
Correct Ans: C
Que 10: Mica is used in an electric iron because it is a
(A) Good conductor of heat
(B) Bad conductor of heat
(C) Good conductor of electricity
(D) Bad conductor of electricity
Correct Ans: D
Login to add Comments.